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United States Patent | 6,172,357 |
Sano ,   et al. | January 9, 2001 |
Disclosed is a photoelectric tilt-detecting sensor which, while simple in structure, is reduced of traveling-around of light transmitted therein to thereby improve the signal-to-noise ratio. The tilt-detecting sensor has a light-emitting element and a light-receiving element respectively fixed in an opposed relation in a main body, and slant surfaces provided between the light-emitting element and the light-receiving element to define a space in the main body. The slant surfaces has an elongate groove so that a spherical ball is allowed to stably move therealong. A lid integral with the main body enables bending thereof to enclose the space of the main body. These lid and the main body is formable in one body by using dies through simplified processes, realizing large-scaled production.
Inventors: | Sano; Masashi (Kyoto, JP); Sakai; Kazuhito (Kyoto, JP) |
Assignee: | Rohm Co., Ltd. (Kyoto, JP) |
Appl. No.: | 399819 |
Filed: | September 21, 1999 |
Sep 21, 1995[JP] | 7-242795 | |
Sep 25, 1995[JP] | 7-246403 | |
Oct 24, 1995[JP] | 7-275968 | |
Aug 23, 1996[JP] | 8-222851 |
Current U.S. Class: | 250/231.1; 438/25; 438/28 |
Intern'l Class: | H01L 021/00; G01D 005/34 |
Field of Search: | 250/231.1,221,229,239 340/689 200/61.45 R 438/24,25,26,28,34 |
2952184 | Sep., 1960 | Bakke et al. | |
4364489 | Dec., 1982 | Alexeeff. | |
4538731 | Sep., 1985 | Cillario. | |
4655342 | Apr., 1987 | Brauner et al. | |
4726091 | Feb., 1988 | Joyce. | |
4727248 | Feb., 1988 | Meur et al. | |
5127537 | Jul., 1992 | Graham. | |
5202559 | Apr., 1993 | Durst. | |
5373153 | Dec., 1994 | Cumberledge et al. | |
Foreign Patent Documents | |||
31 12 057 A1 | Mar., 1980 | DE. | |
35 40948 C2 | May., 1987 | DE. | |
91 06 217 | Sep., 1991 | DE. | |
91 06 217 U1 | Nov., 1991 | DE. | |
2 072 838 | Oct., 1981 | GB. | |
6045637 | Feb., 1994 | JP. |